Cummins ISM-370 Troubleshooting
| Engine Model: Cummins ISM-370 |
| Engine Type: 4-cycle inline 6-cylinder HPCR or Celect fuel injection liquid-cooled diesel |
| Total Displacement: 661 cu.in (10.8 L) |
| Rated Engine Power: 370 Hp (276 kW) at 2000 rpm |
| Aspiration Type: Turbocharged |
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| Engine starts up hard or doesn't start |
Fuel filter element is dirty - Service or replace the filter.
Air in fuel tank - Bleed fuel tank.
Clogged or defective injection nozzles - Clean or replace injection nozzles.
Fuel injection pump malfunctioning - Replace or rebuild injection pump.
Incorrect valve timing - Set the valve timing correctly.
Fuel pipes clogging - Clean fuel pipes.
Incorrect injection timing - Set up as recommended.
Worn piston rings and cylinder - Replace defective parts.
| Diesel starts but immediately stops |
Fuel filter plugged - Service or replace the filter.
Fuel injection pump malfunctioning - Install a new fuel pump or repair.
Air filter clogged - Change air filter element.
Nozzle opening pressure is not adjusted - Set it correctly.
| Engine stalls while running |
Incorrect adjustment of fuel injection pump timing - Set up as recommended.
Fuel filter element is clogged - Replace the filter element.
Engine has not warmed up to the recommended temperature - Warm up to required temperature.
Injection nozzles are burnt or jammed - Clean or replace injection nozzles.
| Engine stalls when idling |
Low idle speed set incorrectly - Correct low idle adjustment.
Valve clearance is out of adjustment - Adjust valve clearance.
Fuel injection pump is damaged - Rebuild or replace pump.
Dirty or faulty injection nozzles - If necessary, replace with a new nozzle.
Fuel hoses or lines are clogged - Clean fuel lines and hoses.
Air filter is dirty - Clean or replace element.
Leaking cylinder head gasket - Install new cylinder head gasket.
Injection timing is improper - Adjust according to specifications.
Fuel injection pump is broken - Install a new pump or rebuild.
Any of moving engine components is faulty - Repair or replace defective parts.
Radiator fins are dirty or radiator cap is defective - Install new cap or clean radiator.
Insufficient coolant fluid - The cooling system needs to be refilled and checked for faults.
Fan belt is loose or defective - Install new fan belt.
Engine oil level low - Fill up the oil to required level.
Cylinder head gasket is blown - Replace cylinder head gasket.
Injection timing is wrong - Check injection timing adjustment.
Low crankcase oil level - Add oil as required.
Defective oil pump - Repair or change.
Plugged engine oil filter - Change or clean engine oil filter element.
Stuck or defective relief valve - Replace or service relief valve.
Clearance of crankshaft bearing is excessive - Inspect and replace or repair faulty parts.
Excessive crankpin bearing clearance - Inspect and replace or repair faulty components.
| Excessive engine oil consumption |
External oil leaks: Seals or gaskets are defective - Replace defective parts.
Improper oil viscosity - Fill up with the proper oil viscosity.
Piston rings are defective or worn - Change piston rings.
Valve guides or stems are damaged - Valves must be replaced.
Pistons or cylinder liners are scuffed - Inspect liners and pistons, change as necessary.
Engine is not preheated - Engine is not warmed up to the required temperature.
Engine oil level is low - Add oil to the engine crankcase.
Improper setting of fuel injection pump timing - Use the correct fuel injection pump timing adjustment.
Broken or worn pistons - Pistons replacement required.
Connecting rod is worn or not aligned - Connecting rod needs to be replaced or aligned.
Low battery output - Recharge the battery.
Battery does not hold charge - Service or replace the battery.
Bad terminals or disconnected battery cables - Connect cables properly or replace terminals.
Battery is low or faulty - Recharge or change battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Low battery voltage - Charge the battery.
Starter motor is damaged - Replace or repair starter.
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